Phantom Pain

Why in News?

Phantom pain is one of the most puzzling pain conditions in medicine; even after a limb or body part has been removed, the brain can continue to perceive sensations, sometimes mild, sometimes debilitating.

• Phantom Pain – It is a neurological condition where people feel sensations, often painful—in a body part that has been amputated or removed.
• History – The term “phantom” originates from words meaning illusion or ghost, describing the strange experience of sensing a missing body part.
• It was first described in the 16th century by French military surgeon Ambroise Paré.
• The term “phantom limb” coined in 1871 by American neurologist Silas Weir Mitchell.
• Beyond limbs – It is most associated with arm or leg amputations, it is not limited to limb loss; it can also occurs after breast removal, eye removal, tooth extraction, or rectal surgery.
• Phantom Sensation vs Phantom Pain
• Phantom sensation – The feeling that a removed body part is still present, generally harmless.
• Phantom pain – It involves actual discomfort or pain arising from that absent part. 
• It can significantly affect sleep, daily activities, and quality of life.
• Symptoms – Phantom pain can vary widely from person to person like burning, stabbing, cramping, throbbing, electric shock-like pain, itching, tingling, or a sensation that the missing limb is still moving.
• Although some people experience phantom pain soon after surgery or months later, often peaking within 6–12 months.
• Prevalence
  • Global prevalence – 50–80% of amputees.
  • India prevalence – 40–70%, especially among diabetes-related amputations, vascular disease, road traffic injuries, and trauma.
• Risk factors
  • Severe pain before amputation
  • Poorly controlled post-operative pain
  • Traumatic amputations or nerve injuries
  • Anxiety, depression, post-traumatic stress disorder, poor sleep
• Reason for feeling Pain – The brain retains a “map” of the missing limb, continuing to generate sensations, the remaining nerves send abnormal signals interpreted as pain.
• This mismatch between brain memory and nerve activity drives phantom pain.
• Treatment – There is currently no single cure for this; a multidisciplinary approach can provide significant relief.
• Medications – Gabapentin, pregabalin, certain antidepressants.
• Mirror therapy – Using a mirror to create the illusion of the missing limb, helping the brain reorganize perception.
• Other methods
  • Early rehabilitation and prosthetic fitting
  • Physical stimulation of the residual limb
  • Psychological support and CBT
  • Acupuncture, complementary therapies
  • Emerging techniques – VR-based rehab, brain stimulation

Reference

The Hindu | Phantom Pain